[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5303/PKAS.2015.30.2.159

PHYSICAL AND CHEMICAL PROPERTIES OF PLANETARY NEBULAE WITH WR-TYPE NUCLEI

DANEHKAR, ASHKBIZ (Department of Physics and Astronomy, Macquarie University)
WESSON, ROGER (European Southern Observatory)
KARAKAS, AMANDA I. (Research School of Astronomy & Astrophysics, Australian National University)
PARKER, QUENTIN A. (Department of Physics and Astronomy, Macquarie University)

Publication Information

Publications of The Korean Astronomical Society / v.30, no.2, 2015 , pp. 159-161 More about this Journal

Abstract

We have carried out optical spectroscopic measurements of emission lines for a sample of Galactic planetary nebulae with Wolf-Rayet (WR) stars and weak emission-line stars (wels). The plasma diagnostics and elemental abundance analysis have been done using both collisionally excited lines (CELs) and optical recombination lines (ORLs). It was found that the abundance discrepancy factors ( $ADF{\equiv}ORL/CEL$ ) are closely correlated with the difference between temperatures derived from forbidden lines and those from $He\;{\small{I}}$ recombination lines, implying the existence of H-deficient materials embedded in the nebula. The $H{\beta}$ surface brightness correlations suggest that they might be also related to the nebular evolution.

Keywords

ISM: abundances; planetary nebulae: general; stars: Wolf-Rayet;

Citations & Related Records

Reference

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